class Settings:
    '''存储游戏《外星人入侵》中所有设置的类'''

    def __init__(self):
        '''初始化游戏的设置'''
        #屏幕设置
        self.screen_width = 1200
        self.screen_height = 800
        #设置背景颜色（红，绿，蓝）
        self.bg_color = (230,230,230)
        #飞船设置
        self.ship_speed = 1.5
        self.ship_limit = 2
        #子弹设置
        self.bullet_speed = 1.0
        self.bullet_width = 3
        self.bullet_height = 15
        self.bullet_color = (60,60,60)
        self.bullet_allowed = 3
        #外星人设置
        self.alien_speed = 1.0
        self.fleet_drop_speed = 10
        #fleet_direction 为1表示向右移，为-1表示向左移
        self.fleet_direction = 1

        #加快游戏节奏的速度
        self.speedup_scale = 1.1
        self.score_scale = 1.5
        self.initialize_dynamic_settings()

    def initialize_dynamic_settings(self):
        '''初始化随游戏进行而变化的设置'''
        self.ship_speed = 1.5
        self.bullet_speed = 3.0
        self.alien_speed = 1.0
        # fleet_direction为1表示向右，为-1表示向左
        self.fleet_direction = 1

        #记分
        self.alien_points = 50

    def increse_speed(self):
        '''提高速度设置'''
        self.ship_speed *= self.speedup_scale
        self.alien_speed *= self.speedup_scale
        self.bullet_speed *= self.speedup_scale
        self.alien_points = int(self.alien_points*self.score_scale)
